Portable Fire Extinguishers Practice Test

The C rating means the extinguisher is suitable for electrical fires. Extinguishing agents with this rating are non-conductive, so they won’t create an electrical path that could shock you or cause a short circuit while you’re applying them to equipment. This makes them appropriate when dealing with fires in electrical devices or wiring, especially if you can’t immediately shut the power off. Keep in mind that the preferred approach is to de-energize the equipment first, but the C rating signals that the extinguisher won’t introduce an electrical hazard to the fire scenario.